DIRECT CURRENT GENERATORS 



67 



In case a core loss test is not made, the running light 

 is substituted in the formula for the quantity (Wi + W^ 

 If the segregation of the losses in the series 



/oo 



/40 



^L 8 /( W S2O /4O, 



Fig. 22. Efficiency and Losses on a 100 Kw., 6-Pole, 275 R.P.M., 

 525/575 Volts, Compound Wound D-C. Generator 



and commutating pole fields and their respective german 

 silver shunts is notjrequired, the resistances R s and R 9 



